High Heat-Flux Sensor Calibration - A Monte Carlo Modeling

2004 ◽  
Author(s):  
Annageri Murthy ◽  
Alexander Prokhorov ◽  
David DeWitt
Keyword(s):  
Heat Flux ◽  
Monte Carlo ◽  
High Heat ◽  
Heat Flux Sensor ◽  
Sensor Calibration ◽  
High Heat Flux ◽  
Monte Carlo Modeling ◽  
Flux Sensor

High Heat-Flux Sensor Calibration: A Monte Carlo Modeling

2004 ◽  
Vol 18 (3) ◽  
pp. 333-341 ◽  
Author(s):  
A. V. Murthy ◽  
A. V. Prokhorov ◽  
D. P. DeWitt
Keyword(s):  
Heat Flux ◽  
Monte Carlo ◽  
High Heat ◽  
Heat Flux Sensor ◽  
Sensor Calibration ◽  
High Heat Flux ◽  
Monte Carlo Modeling ◽  
Flux Sensor

High-heat-flux sensor calibration using black-body radiation

Metrologia ◽  
1998 ◽  
Vol 35 (4) ◽  
pp. 501-504 ◽  
Author(s):  
A V Murthy ◽  
B K Tsai ◽  
R D Saunders
Keyword(s):  
Heat Flux ◽  
Black Body ◽  
High Heat ◽  
Black Body Radiation ◽  
Heat Flux Sensor ◽  
Sensor Calibration ◽  
High Heat Flux ◽  
Flux Sensor

High-heat-flux sensor calibration using calorimetry

Metrologia ◽  
2004 ◽  
Vol 41 (4) ◽  
pp. 314-318 ◽  
Author(s):  
J Ballestrín ◽  
C A Estrada ◽  
M Rodríguez-Alonso ◽  
C Pérez-Rábago ◽  
L W Langley ◽  
...  
Keyword(s):  
Heat Flux ◽  
High Heat ◽  
Heat Flux Sensor ◽  
Sensor Calibration ◽  
High Heat Flux ◽  
Flux Sensor

Design and Calibration of a Novel High Temperature Heat Flux Gage

2005 ◽  
Author(s):  
Sujay Raphael-Mabel ◽  
Scott Huxtable ◽  
Andrew Gifford ◽  
Thomas E. Diller
Keyword(s):  
Heat Flux ◽  
High Temperature ◽  
High Heat ◽  
Heat Flux Sensor ◽  
High Heat Flux ◽  
Average Value ◽  
Metal Plates ◽  
New Type ◽  
Flux Sensor ◽  
Calibration Apparatus

A new type of heat flux sensor (HTHFS) has been designed and constructed for applications at high temperature and high heat flux. It is constructed by connecting solid metal plates to form brass/steel thermocouple junctions in a series circuit. The thermal resistance layer of the HTHFS consists of the thermocouple materials themselves, thus improving temperature limits and lowering the temperature disruption of the sensor. The sensor can even withstand considerable erosion of the surface with little effect on the operation. A new type of convection calibration apparatus was designed and built specifically to supply a large convection heat flux. The heat flux was supplied simultaneously to both a test and standard gage by using two heated jets of air that impinged perpendicularly on the surface of each gage. The sensitivity for the HTHFS was measured to have an average value of 20 μV/(W/cm2). The uncertainty in this result was determined to be ±10% over the entire range tested. The sensitivity agrees with the theoretically calculated sensitivity for the materials and geometry used. Recommendations for future improvements in the construction and use of the sensors are discussed.

Micromachined Thermopile Based High Heat Flux Sensor

2020 ◽  
Vol 29 (1) ◽  
pp. 36-42 ◽  
Author(s):  
Wei Tian ◽  
Yi Wang ◽  
Hong Zhou ◽  
Yuelin Wang ◽  
Tie Li
Keyword(s):  
Heat Flux ◽  
High Heat ◽  
Heat Flux Sensor ◽  
High Heat Flux ◽  
Flux Sensor

Experimental and Computational Characterization of High Heat Fluxes During Transient Blackbody Calibrations

2009 ◽  
Vol 132 (2) ◽  
Author(s):  
Amanie N. Abdelmessih ◽  
Thomas J. Horn
Keyword(s):  
Heat Flux ◽  
Thermal Equilibrium ◽  
Numerical Models ◽  
High Heat ◽  
Heat Fluxes ◽  
Experimental Results ◽  
Heat Flux Sensor ◽  
Transient Calibration ◽  
Transient Thermal ◽  
Flux Sensor

High heat fluxes are encountered in numerous applications, such as on the surfaces of hypersonic vehicles in flight, in fires, and within engines. The calibration of heat flux gauges may be performed in a dual cavity cylindrical blackbody. Insertion of instruments into the cavity disturbs the thermal equilibrium resulting in a transient calibration environment. To characterize the transient heat fluxes, experiments were performed on a dual cavity cylindrical blackbody at nominal temperatures varying from 800°C to 1900°C in increments of 100°C. The pre-insertion, steady state, axial temperature profile is compared experimentally and numerically. Detailed transient thermal models have been developed to simulate the heat flux calibration process at two extreme fluxes: the high flux is 1 MW/m2 and the relatively low is 70 kW/m2. Based on experiments and numerical analysis, the optimum heat flux sensor insertion location as measured from the center partition was determined. The effect of convection (natural and forced) in the blackbody cavity during the insertion is calculated and found to be less than 2% at high temperatures but reaches much higher values at relatively lower temperatures. The transient models show the effect of inserting a heat flux gauge at room temperature on the thermal equilibrium of the blackbody at 1800°C and 800°C nominal temperatures. Also, heat flux sensor outputs are derived from computed sensor temperature distributions and compared with experimental results. The numerical heat flux agreed with the experimental results to within 5%, which indicates that the numerical models captured the transient thermal physics during the calibration. Based on numerical models and all experimental runs the heat transfer mechanisms are explained.

The Calibration Method of Thermal Heat Flux Sensor Based on Wireless Sensor Networks

2014 ◽  
Vol 651-653 ◽  
pp. 538-542
Author(s):  
Xiao Shi Zheng ◽  
Guang He Cheng ◽  
Qing Long Meng ◽  
Feng Qi Hao ◽  
Xuan Cai Xu ◽  
...  
Keyword(s):  
Heat Flux ◽  
Wireless Sensor Networks ◽  
Sensor Networks ◽  
Calibration Method ◽  
Wireless Sensor ◽  
Heat Flux Sensor ◽  
Sensor Calibration ◽  
Advantages And Disadvantages ◽  
Calibration Methods ◽  
Flux Sensor

This paper analyzed the advantages and disadvantages of existing heat flux sensor calibration methods, proposed a calibration method of thermal heat flux sensor based on wireless sensor networks. Experimental results showed that the detection error was reduced from 6% to 2% after calibration. The proposed method has many advantages, such as short calibration time, accurate results, easy installation as well as batching calibration. In a word, this method is available to calibrate heat flux sensors and will have an important significance for accurate measurement of heat flux.

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